[llvm] [mlir][bufferization] Add deallocation option to remove existing dealloc operations, add option to specify the kind of alloc operations to consider (PR #67556)

[Matthias Springer via llvm-commits]

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@@ -40,6 +40,12 @@ struct BufferDeallocationPipelineOptions
           "statically that the ABI is not adhered to, an error will already be "
           "emitted at compile time. This cannot be changed with this option."),
       llvm::cl::init(true)};
+  PassOptions::Option<bool> removeExistingDeallocations{
+      *this, "remove-existing-deallocations",
+      llvm::cl::desc("Removes all pre-existing memref.dealloc operations and "
+                     "insert all deallocations according to the buffer "
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matthias-springer wrote:

I think just `Removes pre-existing memref.dealloc operations` should be enough.

https://github.com/llvm/llvm-project/pull/67556